CN103926357B - Gas in Oil of Transformer chromatographic peak area computing method - Google Patents
Gas in Oil of Transformer chromatographic peak area computing method Download PDFInfo
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- CN103926357B CN103926357B CN201410139244.8A CN201410139244A CN103926357B CN 103926357 B CN103926357 B CN 103926357B CN 201410139244 A CN201410139244 A CN 201410139244A CN 103926357 B CN103926357 B CN 103926357B
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- 238000004364 calculation method Methods 0.000 title claims abstract description 15
- 238000004587 chromatography analysis Methods 0.000 claims abstract description 5
- 238000011208 chromatographic data Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 44
- 238000005516 engineering process Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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Abstract
A kind of Gas in Oil of Transformer chromatographic peak area computing method, relate to power transformer technical field, and what solve is the technical matters improving computational accuracy.The method first draws the chromatographic curve of Gas in Oil of Transformer, again according to the chromatographic peak beginning and ending time point computer chromatography mean value of chromatographic curve, and then second-order correction is carried out to chromatogram mean value, the chromatographic peak area of object gas chromatographic curve is finally gone out again according to revised chromatogram mean value calculation.Method provided by the invention, is applicable to the content detecting Gas in Oil of Transformer.
Description
Technical field
The present invention relates to power transformer technology, particularly relate to a kind of technology of Gas in Oil of Transformer chromatographic peak area computing method.
Background technology
In electric system, insulating material in the oil-filled pipeline of transformer of normal operation and transformer insulation oil, can be aging gradually under the effect such as hot, electric, produce multiple inflammable gas, constantly accumulation, convection current, diffusion, dissolving in the fluid of these gases in the oil-filled pipeline of transformer, until saturated and bubble, analyzes the gas content in transformer oil, insulation status and the internal electric equipment discharge scenario of transformer can be identified, effectively can reduce the generation of Accident of Transformer.
One of gas content in transformer oil detection method uses chromatogram, the method of existing employing chromatogram calculating transformer oil dissolved gas content is: the chromatographic peak area size first being calculated Gas in Oil of Transformer chromatographic curve by the mode of correlation calibration value, then draws gas content in transformer oil according to the chromatographic peak area calculated.The impact that the chromatographic peak area that this method calculates is subject to temperature and environmental interference gas is comparatively large, and its computational solution precision is lower.
Summary of the invention
For the defect existed in above-mentioned prior art, technical matters to be solved by this invention is to provide the high Gas in Oil of Transformer chromatographic peak area computing method of a kind of computational accuracy.
In order to solve the problems of the technologies described above, a kind of Gas in Oil of Transformer chromatographic peak area computing method provided by the present invention, it is characterized in that, concrete steps are as follows:
1) utilizing chromatograph, take time shaft as abscissa axis, with chromatogram value axle for axis of ordinates, draws the chromatographic curve of each component gas in transformer oil;
2) choose and need the gas composition of computer chromatography peak area to be object gas, the chromatographic peak start time point of target setting gas chromatogram curve and chromatographic peak stop time point, chromatographic peak start time point is wherein designated as T0, and chromatographic peak stop time point is designated as T1;
3) calculate the chromatogram mean value of object gas chromatographic curve from T0 to T1, its computing formula is:
In formula, Vp is the chromatogram mean value of object gas chromatographic curve from T0 to T1, V
ifor object gas chromatographic curve is in the chromatogram value of time point i;
4) the chromatographic data of object gas chromatographic curve from T0 to T1, choose all chromatographic datas being less than Vp, and calculate the chromatogram mean value of these chromatographic datas, be designated as Vd;
5) the chromatographic data of object gas chromatographic curve from T0 to T1, choose all chromatographic datas being less than Vd, and calculate the chromatogram mean value of these chromatographic datas, be designated as Vs;
6) calculate the chromatographic peak area of object gas chromatographic curve, its computing formula is:
In formula, S is the chromatographic peak area of object gas chromatographic curve, V
ifor object gas chromatographic curve is in the chromatogram value of time point i.
Further, the value of the chromatographic peak start time point T0 of object gas chromatographic curve is set as: T0=r × Ts;
In formula, Ts is chromatographic chromatographic peak initial time minimum range, and r is safety factor, and the value of r is 0.9.
Further, the value of the chromatographic peak stop time point T1 of object gas chromatographic curve is set as: T1=k × Tm;
In formula, Tm is chromatographic chromatographic peak end time maximum range, and k is safety factor, and the value of k is 1.2.
Gas in Oil of Transformer chromatographic peak area computing method provided by the invention, according to the chromatographic peak beginning and ending time computer chromatography mean value of the chromatographic curve of Gas in Oil of Transformer, and second-order correction is carried out to chromatogram mean value, the chromatographic peak area of Gas in Oil of Transformer is gone out again according to revised chromatogram mean value calculation, the method, by reducing environment temperature and environmental interference gas to the correction of chromatogram mean value on the impact of chromatogram calculated by peak area, can improve the computational accuracy of chromatographic peak area.
Accompanying drawing explanation
Fig. 1 is the calculation flow chart of embodiment of the present invention Gas in Oil of Transformer chromatographic peak area computing method.
Embodiment
Illustrate below in conjunction with accompanying drawing and be described in further detail embodiments of the invention, but the present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar change thereof, all should list protection scope of the present invention in.
As shown in Figure 1, a kind of Gas in Oil of Transformer chromatographic peak area computing method that the embodiment of the present invention provides, it is characterized in that, concrete steps are as follows:
1) utilizing chromatograph, take time shaft as abscissa axis, with chromatogram value axle for axis of ordinates, draws the chromatographic curve of each component gas in transformer oil;
2) choose and need the gas composition of computer chromatography peak area to be object gas, the chromatographic peak start time point of target setting gas chromatogram curve and chromatographic peak stop time point, chromatographic peak start time point is wherein designated as T0, and chromatographic peak stop time point is designated as T1;
Wherein, T0=r × Ts, Ts are chromatographic chromatographic peak initial time minimum range, and r is safety factor, and the value of r is generally 0.9; T1=k × Tm, Tm are chromatographic chromatographic peak end time maximum range, and k is safety factor, and the value of k is generally 1.2;
3) calculate the chromatogram mean value of object gas chromatographic curve from T0 to T1, its computing formula is:
In formula, Vp is the chromatogram mean value of object gas chromatographic curve from T0 to T1, V
ifor object gas chromatographic curve is in the chromatogram value of time point i;
4) the chromatographic data of object gas chromatographic curve from T0 to T1, choose all chromatographic datas being less than Vp, and calculate the chromatogram mean value of these chromatographic datas, be designated as Vd;
5) the chromatographic data of object gas chromatographic curve from T0 to T1, choose all chromatographic datas being less than Vd, and calculate the chromatogram mean value of these chromatographic datas, be designated as Vs;
6) calculate the chromatographic peak area of object gas chromatographic curve, its computing formula is:
In formula, S is the chromatographic peak area of object gas chromatographic curve, V
ifor object gas chromatographic curve is in the chromatogram value of time point i.
Claims (3)
1. Gas in Oil of Transformer chromatographic peak area computing method, is characterized in that, concrete steps are as follows:
1) utilizing chromatograph, take time shaft as abscissa axis, with chromatogram value axle for axis of ordinates, draws the chromatographic curve of each component gas in transformer oil;
2) choose and need the gas composition of computer chromatography peak area to be object gas, the chromatographic peak start time point of target setting gas chromatogram curve and chromatographic peak stop time point, chromatographic peak start time point is wherein designated as T0, and chromatographic peak stop time point is designated as T1;
3) calculate the chromatogram mean value of object gas chromatographic curve from T0 to T1, its computing formula is:
；
In formula, Vp is the chromatogram mean value of object gas chromatographic curve from T0 to T1,
for object gas chromatographic curve is in the chromatogram value of time point i;
4) the chromatographic data of object gas chromatographic curve from T0 to T1, choose all chromatographic datas being less than Vp, and calculate the chromatogram mean value of these chromatographic datas, be designated as Vd;
5) the chromatographic data of object gas chromatographic curve from T0 to T1, choose all chromatographic datas being less than Vd, and calculate the chromatogram mean value of these chromatographic datas, be designated as Vs;
6) calculate the chromatographic peak area of object gas chromatographic curve, its computing formula is:
；
；
In formula, S is the chromatographic peak area of object gas chromatographic curve,
for object gas chromatographic curve is in the chromatogram value of time point i.
2. Gas in Oil of Transformer chromatographic peak area computing method according to claim 1, is characterized in that: the value of the chromatographic peak start time point T0 of object gas chromatographic curve is set as: T0=r × Ts;
In formula, Ts is chromatographic object gas chromatographic peak initial time, and r is safety factor, and the value of r is 0.9.
3. Gas in Oil of Transformer chromatographic peak area computing method according to claim 1, is characterized in that: the value of the chromatographic peak stop time point T1 of object gas chromatographic curve is set as: T1=k × Tm;
In formula, Tm is the chromatographic object gas chromatographic peak end time, and k is safety factor, and the value of k is 1.2.
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| CN103926357B true CN103926357B (en) | 2015-10-07 |
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Effective date of registration: 20181010 Address after: 100032 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Co-patentee after: ANYANG POWER SUPPLY COMPANY, STATE GRID HENAN ELECTRIC POWER CO., LTD. Patentee after: State Grid Corporation of China Address before: 200233 4, 14 building, 470 Guiping Road, Xuhui District, Shanghai. Patentee before: Shanghai Sunrise Power Technology Co., Ltd. |
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Granted publication date: 20151007 Termination date: 20190409 |
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